RadImageEditor can use all fonts that are installed on the server for adding text in the edited picture. You can also configure the color of the text, if this is what you mean by color support
. The rest of the features you listed are currently not supported.
You can check all available options for customizing the inserted text in the following demo: http://demos.telerik.com/aspnet-ajax/imageeditor/examples/addtext/defaultcs.aspx
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